Add all dressing ingredients to a bowl and mix together until smooth. Depending on how thick your tahini is you may need to adjust the water level.
Pat steak completely dry. Coat each side with salt and pepper.
Bring a skillet (preferably cast iron or stainless steel) to high heat and coat with oil. Sear steak for 3-4 minutes on each side**. Remove from skillet and let rest for 10 minutes. Cut steak into cubes.
Add all salad ingredients to a large bowl, add in steak and toss with dressing. Serve and enjoy.
Notes
*Let steak sit out for 20 or preferably 30 minutes so it comes to room temperature. I like to take mine out of the fridge, salt it to pull out the water, dry it and then resalt it.**If your steak is super thick you may need to pop it in the oven for 1-4 minutes at 400 degrees.